Synchronizer (Oracle Graph Java API Reference for Property Graph Release 25.1 (G23914-01))

All Known Implementing Classes:

FlashbackSynchronizer
```
public interface Synchronizer
```
Synchronizes changes in an external data source with a PGX graph.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class Synchronizer.Builder<T extends Synchronizer>
Builder class for Synchronizer objects.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`PgxGraph`	`apply()`	Applies the changes to the underlying PGX graph.
`void`	`fetch()`	Fetches the changes from the external data source.
`GraphDelta`	`getGraphDelta()`	Get the description of the delta between current snapshot and the fetched changes.
`default PgxGraph`	`sync()`	Synchronize changes from the external data source.

- Method Detail
  - fetch
```
void fetch()
    throws java.sql.SQLException
```
    Fetches the changes from the external data source. You can call this multiple times to accumulate deltas. The deltas reset once you call apply().
    
    Throws:
    
    java.sql.SQLException
  - apply
```
PgxGraph apply()
```
    Applies the changes to the underlying PGX graph. Require fetch() to be called first.
    
    Returns:
    
    the new snapshot of the graph with the fetched changes applied.
  - getGraphDelta
```
GraphDelta getGraphDelta()
```
    Get the description of the delta between current snapshot and the fetched changes. Can be used to make a decision for when to apply the delta.
    
    Returns:
    
    the description of the delta.
  - sync
```
default PgxGraph sync()
               throws java.sql.SQLException
```
    Synchronize changes from the external data source. By default, this calls fetch() followed by apply()
    
    Returns:
    
    the new snapshot of the graph with the fetched changes applied.
    
    Throws:
    
    java.sql.SQLException